Case for simple UPS for router

Unfortunately, there is a troubles with electric power in UA because of russian bombs and missiles. Some areas gets interrupts schedules. So, sometimes I don't have electric power home, but my internet provider has.
I bought simple 12V UPS module and attach 18650 battery to it. And now I have possibility to keep power on my router.

There is a case for this simple device. Note, you will need the six nuts which should be inserted in the holes